/**
 * Licensed to the Apache Software Foundation (ASF) under one or more contributor license
 * agreements.  See the NOTICE file distributed with this work for additional information regarding
 * copyright ownership.  The ASF licenses this file to you under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with the License.  You may obtain
 * a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License
 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 * or implied. See the License for the specific language governing permissions and limitations under
 * the License.
 */

package org.apache.zookeeper.server;

/**
 * Zookeeper data tree MBean.
 */
public interface DataTreeMXBean {
    /**
     * @return number of znodes in the data tree.
     */
    int getNodeCount();

    /**
     * @return the most recent zxid processed by the data tree.
     */
    String getLastZxid();

    /**
     * @return number of watches set.
     */
    int getWatchCount();

    /**
     * @return data tree size in bytes. The size includes the znode path and 
     * its value.
     */
    long approximateDataSize();

    /**
     * @return number of ephemeral nodes in the data tree
     */
    int countEphemerals();
}
